A protein kinase can phosphorylate an enzyme and activate it by
A) changing the enzyme's function.
B) increasing the number of enzyme molecules.
C) decreasing the number of enzyme inhibitors.
D) changing the shape of the enzyme to expose an active site.
E) increasing transcription of the enzyme.

Question

Quizplus · Accepted Answer

Protein kinases can phosphorylate enzymes and activate them by changing the shape of the enzyme to expose an active site.

A Protein Kinase Can Phosphorylate an Enzyme and Activate It